import pygame.font
from pygame.sprite import Group
from ship import Ship

class Scoreboard():
    def __init__(self,ai_settings,screen,stats):
        #初始化显示得分设计的属性
        self.screen=screen
        self.screen_rect=screen.get_rect()
        self.ai_settings=ai_settings
        self.stats=stats

        self.text_color=(30,30,30)
        self.font=pygame.font.SysFont(None,48)

        self.prep_score()
        self.prep_high_score()
        self.prep_level()
        self.prep_ships()

    def prep_score(self):
        """将得分转化为一副渲染的图像"""
        rounded_score = int(round(self.stats.score, -1))
        score_str = "{:,}".format(rounded_score)
        self.score_image=self.font.render(score_str,True,self.text_color,
                                          self.ai_settings.bg_color)
        self.score_rect=self.score_image.get_rect()
        self.score_rect.right=self.screen_rect.right-20
        self.score_rect.top=20

    def prep_high_score(self):
        """将最高得分转换为渲染的图像"""
        high_score = int(round(self.stats.high_score, -1))
        high_score_str = "{:,}".format(high_score)
        self.high_score_image = self.font.render(high_score_str, True,
                     self.text_color, self.ai_settings.bg_color)
        # 将最高得分放在屏幕顶部中央
        self.high_score_rect = self.high_score_image.get_rect()
        self.high_score_rect.centerx = self.screen_rect.centerx
        self.high_score_rect.top = self.score_rect.top

    def prep_level(self):
        """将等级转换为渲染的图像"""
        self.level_image = self.font.render(str(self.stats.level), True,
                     self.text_color, self.ai_settings.bg_color)
        # 将等级放在得分下方
        self.level_rect = self.level_image.get_rect()
        self.level_rect.right = self.score_rect.right
        self.level_rect.top = self.score_rect.bottom + 10

    def prep_ships(self):
        """显示剩余的飞船数量"""
        self.ships=Group()
        for ship_number in range(self.stats.ships_left):
            ship=Ship(self.ai_settings,self.screen)
            ship.rect.x=10+ship_number*ship.rect.width
            ship.rect.y=10
            self.ships.add(ship)



    def show_score(self):
        """在屏幕上显示得分"""
        self.screen.blit(self.score_image,self.score_rect)
        self.screen.blit(self.high_score_image,self.high_score_rect)
        self.screen.blit(self.level_image, self.level_rect)
        self.ships.draw(self.screen)
